Brand new pit bike bogging

[pitbikeryder]

basically,i bought a brand new 125 crf70 size pit bike for £500, i had about 3hours riding time and now its just randomly started to big whenever i snap the throttle.if i build up the revs slowly its fine and doesnt bog but if i snap the revs from idle to full it will just bog and same if i snap the revs from idle to half

[Ebeneezergood]

What process did you use to break it in?

[pitbikeryder]

20mins idle, then half rev

[Ebeneezergood]

Have you changed the oil? 20 mins idle and half revs? that isnt very descriptive, did you ride it at all? did you rev it half way riding it or while it was standing? it doesnt sound like the best way to run a new engine in to be honest. you need to ride it for at least 1 tank of petrol at slow revs, gradually building up to full throttle, look for the breaking in topics on here for full description. What you want to check is that your carb is propperly tuned, try adjusting the fuel screw quarter turns at a time and try riding it not just revving it.